Regressive Tax
What is Regressive Tax?
A regressive tax is a tax system in which the tax rate decreases as the taxpayer's income increases, placing a higher relative burden on lower-income individuals.
Lower-income individuals pay a larger percentage of their income in taxes than higher-income individuals. Sales taxes are a common example because lower-income households spend a larger share of their income on taxed goods, and the Social Security payroll tax is regressive because earnings above a cap are not taxed. In both cases the effective tax rate (tax as a share of income) falls as income rises.
Regressive Tax: a worked example
A state levies an 8% sales tax, the same posted rate for every shopper. A household earning $30,000 spends $27,000 on taxed items and pays 0.08 x 27,000 = $2,160, an effective rate of 2,160 / 30,000 = 7.2% of income. A household earning $240,000 spends $90,000 on taxed items and pays 0.08 x 90,000 = $7,200, an effective rate of 7,200 / 240,000 = 3% of income. The richer household hands over more than three times the dollars while surrendering less than half the share of its income. Because the effective rate falls from 7.2% to 3% as income rises, the tax is regressive even though the statutory rate never changes.
The mistake students make with regressive tax
Students read the posted rate as the effective rate. Since a sales tax charges 8% to every shopper, they label it proportional and stop there. Regressivity is defined by tax paid as a share of income, and lower income households spend a larger fraction of what they earn, so that share falls as income climbs. A second slip runs the opposite way, assuming regressive means poorer households write bigger checks. They write smaller ones, $2,160 against $7,200 above, but carry the heavier burden relative to income.
Regressive Tax questions
Why is a sales tax regressive?
Sales tax applies to spending rather than to income, and lower income households spend a larger share of what they earn while higher income households save more. A household that spends nearly all its income faces the tax on almost every dollar, while one that saves a third of its income shelters that portion entirely. The share of income paid therefore declines as income rises, which is the definition of regressive.
Can a tax be regressive if everyone pays the same rate?
A single posted rate is fully compatible with regressivity, because the classification compares tax paid to income rather than to the taxed base. Sales taxes, fuel excise taxes, and payroll taxes that stop applying above an earnings cap all show one statutory rate while the share of income paid declines as income climbs. Always compute tax divided by income at two income levels before labelling a tax.
Are gasoline excise taxes regressive?
Gasoline excise taxes usually land in the regressive column, because fuel use rises more slowly than income does. Picture a charge of 40 cents per gallon and two commuters who each burn 500 gallons a year, one earning $30,000 and the other $150,000. Both owe $200, which is 0.67% of the first income and 0.13% of the second. Any per unit tax on a necessity behaves this way, since the quantity bought tracks need rather than earnings.
Related terms
Common comparisons
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